324 THE PROCEEDINGS OF THE LINNEAN SOCIETY 



Plesiastrjja peronii. Ed. fy H. 



A gibbous corallum ; calices unequal, from 3 to 5 mil. in diam., 

 close, unequally salient, edges very distinct, generally circular ; 

 three cycles complete, rarely a few septa of a fourth ; septa strong, 

 feebly denticulate, slightly exsert, very unequal according to the 

 orders. Common from Port Stephens southwards on the E. coast 

 through Bass Straits. 



Division Astranqiace^. 



This is a fifth group of the Astrcea, established by Messrs. 

 Edwards and Haime, to receive those forms which multiply by 

 buds on a basilar expansion and whose corallum is always very 

 short and creeping. 



Genus Ctlicia. Ed. 8f B., 1851. 



Corallum spread over submarine bodies composed of coralites 

 altogether independant of one another but grouped together ; 

 they are produced by budding on a base which does not harden ; 

 they are largely adherent, extremely short, subcylindrical, a little 

 oblique and surrounded by a complete epitheca ; calices subcircular, 

 excavated, and deep ; septa thin, rather close, not exsert, the 

 principal have a subentire edge, the others very deeply toothed ; 

 columella papillary and well developed. 



When these corals are found dead the connecting expansion has 

 disappeared and they look like a close association of numerous 

 calices irregularly scattered over the rock and encrusted with 

 Polyzoa. 



Ctlicia rubeola. Quoy and Oaimard, (as Dendrophyllia). Voy. 

 Zooph. p. 97, pi. 15, /. 12-15. Angia rubeola. Ed. fy H., 

 Ann. Sci. Nat. 



Corallites very short, a little inclined ; epitheca projecting as a 

 thin entire edge; calices circular or subcircular ; fossa wide and 

 deep ; columella well developed, formed by the styliform lobes of 

 septa or undistinguishable from them, they gradually lengthen 

 towards the edge ; three cycles in six systems, but the third 

 wanting in two systems, giving the appearance of five ternary 



